Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-08-21
Chem. Phys. Lett. 478, 234 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
online-published version, minor modifications
Scientific paper
10.1016/j.cplett.2009.07.053
We show that quantum coherence of biomolecular excitons is maintained over exceedingly long times due to the constructive role of their non-Markovian protein-solvent environment. Using a numerically exact approach, we demonstrate that a slow quantum bath helps to sustain quantum entanglement of two pairs of Forster coupled excitons, in contrast to a Markovian environment. We consider the crossover from a fast to a slow bath and from weak to strong dissipation and show that a slow bath can generate robust entanglement. This persists to surprisingly high temperatures, even higher than the excitonic gap and is absent for a Markovian bath.
Eckel Jens
Nalbach Peter
Reina John Henry
Thorwart Michael
Weiss Stephan
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